If 2.32 moles of iron react with excess oxygen gas, how many moles of Fe2O3 can be produced?

Moles Fe₂O₃ produced : 1.16 moles

Given

2.32 moles of iron

Required

moles of Fe2O3

Solution

The reaction coefficient in a chemical equation shows the mole ratio of the reacting compounds (reactants and products)

Reaction

4 Fe + 3 O₂ ⇒  2 Fe₂O₃

From the equation, mol ratio Fe : mol Fe₂O₃ = 4 : 2, so mol Fe₂O₃ :

= 2/4 x mol Fe

= 2/4 x 2.32

= 1.16 moles

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